It might have been a Persuader, or it could have been an Elan with that headstock, but it clearly has had modification. The position of those two switches is also awfully high on the body, suggesting that there may have been some additional routing done to accommodate the change. If Alembic did the mods, the value of the bass will be unchanged or maybe enhanced slightly. If anyone else did them, the value falls. There's even a slight chance that the mods were ordered that way from new.
If it was a Persuader, the body core/back would probably be mahogany where an Elan could be maple. Another item of note is that most Persuader basses were made in 32 scale where Elans tended to be 34.
If you decide not to buy, post us the rest of the info and someone will probably be interested. I know I would be if it's a 32 scale at a reasonable price.
-bob
